Red Delicious most nutritious
Joe Friesen, "Red Delicious most nutritious", Globe and Mail,
May 24, 2005, Link: http://www.theglobeandmail.com/servlet/Ar-
ticleNews/TPStory/LAC/20050524/APPLES24/TPHealth/
An apple a day may keep the doctor away, but new research
shows that when it comes to healthy eating, not all apples are
created equal.
A study by scientists at Agriculture and Agri-Food Canada to
be published this week indicates that of the eight main
varieties of apple grown in Ontario, the Red Delicious is the
most nutritious.
Red Delicious apples contain more than five times as many
antioxidants as Empire apples, the variety with the
lowest antioxidant level, said the study's lead
researcher, Rong Tsao.
"Redder apples are generally richer in antioxidants than pale
coloured apples," Dr. Tsao said, explaining that antioxidants
are the "good chemicals in fruits and vegetables that help us
fight cancers and cardiovascular diseases.
"These are the compounds that are known to fight with the
so-called free radicals in our body."
"The free radicals are the culprits of modern human chronic
diseases."
The study is notable because it pinpoints for the first time
the individual molecules that contribute most to antioxidant
activities in apples. Those molecules were found to be much
more prevalent in the skin of the apple than in the flesh of
the fruit, leading Dr. Tsao to recommend Canadians put down
their peelers and eat the whole apple.
Identifying those molecules will also help scientists such
as Dr. Tsao as they try to produce new breeds of apples
that could potentially contain more concentrated
nutritional benefits.
"So instead of eating two [apples], or even one, you can cut
the [portion] size in half," Dr. Tsao said.
There were significant differences in the antioxidant levels
of the apple varieties used in the study.
The flesh of the Northern Spy was found to be richest in
antioxidants, while the Empire and the Mutsu had the lowest
levels in both their flesh and skin. All the apples used in
the study were grown at the same orchard near Woodstock, Ont.,
and under the same agronomic conditions to guarantee the
consistency of the results.
Dr. Tsao, who works out of the federal Department of
Agriculture and Agri-Food's lab in Guelph, Ont., said the
results don't necessarily mean consumers will change their
apple-eating habits, or that farmers should start
producing only certain varieties.
"Food is a very interesting thing. People don't always choose
food by what is most nutritious," he said.
Apples, which he believes are the second most commonly
consumed fruit after bananas, are not as rich in antioxidants
as blueberries or blackberries. They are, however, more
affordable, more widely available and more robust when it
comes to storage, which means that an apple a day may the most
effective means of ensuring a healthy dose of antioxidants.
Ds. Tsao now plans to use his findings to work with companies
in the apple juicing industry to create new products from
apple waste. The juicing industry typically discards the
peels, he said, which are rich in antioxidants. That
material could be reworked and sold as a new kind of
nutritional product for human or animal consumption.
The study will be published on-line this week in the Journal
of Agricultural and Food Chemistry. Other popular apple
varieties, such as the Granny Smith or the Gala, were left out
of the study because they are not grown locally.
A new study on apples shows that of the eight main varieties
grown in Ontario, Red Delicious has the most antioxidant
activity. Antioxidants in apples have been associated with
lowered risks for certain kinds of cancer.
THE APPLE SKIN TOP 8*
Red Delicious; 17,851
Ida Red; 12,083
Cortland; 11,908
Northern Spy; 10,044
Golden Delicious; 9,616
Mutsu; 6,820
McIntosh; 6.436
Empire; 2,736
THE APPLE FLESH TOP 8*
Northern Spy; 6,425
Cortland; 3,660
Red Delicious; 3,215
MacIntosh; 2,785
Ida Red; 2,749
Golden Delicious; 2,036
Mutsu; 1,584
Empire; 550
*Measured in FRAP units of antioxidant activity - FRAP is a
commonly used measure of antioxidant activity
SOURCE: DEPARTMENT OF AGRICULTURE AND AGRI FOOD
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